Kansas, Nebraska, and Nevada are only available for 1860 data, so they were deleted.
“Age unknown”, over 99, and total males and females data was deleted. States where population was
zero both in 1850 and 1860 were deleted. Under 1 and 1 to 4 were added to make one group in 1850, as
were 10-14 and 15-19. In 1860 data, under 1 and 1-4 were deleted because these people could not have
been alive 10 years earlier, so net migration cannot be calculated for these ages.
Old South states are defined as the compilation of states that have a negative overall migration rate.
We calculated the migration rate by dividing the number of slaves who migrated away from Old South
states by the number of people expected to be living in those states if no slaves had entered or left.
Possible thesis: If people that emigrated fit the same age and sex profile as all the people living in the
Old South states (all people available for emigration), that supports the idea that entire plantations
migrated west together instead of individuals from plantations being selected for migration. 1850 and
1860 population data tells us that it is more likely